This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 37 |
| 3 | 77 |
| 4 | 1368 |
| 5 | 7725 |
| 6 | 13422 |
| 7 | 194535 |
| 8 | 980702 |
| 9 | 1678693 |
| 10 | 24878620 |
| 11 | 121356170 |
| 12 | 196370947 |
| 13 | 2842268794 |
| 14 | 13774086909 |
| 15 | 22130326801 |
| 16 | 315828107827 |
| 17 | 1502885737864 |
| 18 | 2383360502586 |
| 19 | 33977970254723 |
| 20 | 160775285120155 |
| 21 | 252353156923816 |